Diodes AH9280 - Manual (Page 9)

Data Sheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280
Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
9
Typical Application
AH9280
VCC DO DOB GND
V
CC
=5V or 12V
C3
2.2 F
C2
2.2 F
R2
4.7
Coil 1 Coil 2
D1
R3
4.7
C1
2.2 F
R1
47
Figure 14 Typical Application 1 of AH9280 (Note 2)
Note 2:
1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged
reversed.
2. R1=47
Ω typical.
3. C1=C2=C3=2.2 µF typical, electrolytic capacitors are better. They should be fine tuned based on system
design.
4. R2=R3=4.7
Ω typical. They can be removed according to system requirement.